Adjustments work sometimes. Sometimes you can rearrange the tank to create partially separated spaces (more than a sight break), I've had it work if the less dominant fish will keep to his part of the tank and the more dominant fish isn't too determined, if it's mostly content just to chase the other fish back to its end of the tank. Having or adding another pushy fish, enough to slow down the other pushy fish without itself being overly mean can moderate things. And sometimes creating a group instead of just the two helps. Ime these can work ime but aren't guaranteed.
I have a wild A. metae group, a week after I got them a pair formed and it was the little female that bossed the tank, was particularly aggressive to the other female, no damage to fins, but frequent and aggressive harassment, stressful to the other fish. I could have moved them to another tank with plenty of room, but I like that tank as it is. So I was seriously considering selling or trading that pair, which I may eventually do but there's no urgency due to subsequent events: I tried making a defined, somewhat hidden territory at one end of the tank, which helped some, but didn't make peace. Meanwhile a couple of geos in the tank became much feistier, one in particular made itself a territory and started fussing with anything that came close, including any of the Aequidens. I rearranged the tank a bit to limit and better define it's spot, which settled things down enough not to annoy me anymore.
Another thing I've done before-- with a severum and another fish it didn't like-- was an actual divider. Don't remember exactly how long, definitely over a month, but until the two fish were ignoring each other. After that they were fine. The thing with separating fish ime, is one week is not really long enough, unless maybe you've revamped the whole tank, including residents, in the meantime.
No guarantees with such 'tricks' but these are things I've done in cases where aggression was constant or frequent (but without physical damage being done).
